Data key for PROTEC.class digital time switches, Saving the data from the clock on the data key Saving the data from the data key to the clock, To edit the data on the PC you need the programming package: PDSUPPN, Data key PDSZ2N suitable for: PDSU21N, PDSU21SN, PDSU22N, PDSU21AN, PDSU22AN, PDSU21JN, PDSU21GDJN, PDSU22JN, PDSU22GDJN, PDSU1DBN, Data key PDSZ3N suitable for: PDSU44JN